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tsan: fix windows meta mapping 

Currently windows fails on startup with:
CHECK failed: gotsan.cc:3077 "(((m - prev_m) / kMetaShadowSize)) == (((p - prev) / kMetaShadowCell))" (0x3ffffffeffffff7e, 0x6ffffff7e)

Make MemToMeta do the same MemToShadow does on windows: add offset instead of or'ing it.

llvm-svn: 285420
This commit is contained in:
Dmitry Vyukov 2016-10-28 17:25:27 +00:00
parent 22a03e435a
commit 693163e723
1 changed files with 5 additions and 0 deletions
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5
compiler-rt/lib/tsan/rtl/tsan_platform.h
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@ -660,8 +660,13 @@ u32 *MemToMetaImpl(uptr x) {
return (u32*)(((((x) & ~(Mapping::kAppMemMsk | (kMetaShadowCell - 1)))) /
kMetaShadowCell * kMetaShadowSize) | Mapping::kMetaShadowBeg);
#else
# ifndef SANITIZER_WINDOWS
return (u32*)(((x & ~(kMetaShadowCell - 1)) / \
kMetaShadowCell * kMetaShadowSize) | Mapping::kMetaShadowBeg);
# else
return (u32*)(((x & ~(kMetaShadowCell - 1)) / \
kMetaShadowCell * kMetaShadowSize) + Mapping::kMetaShadowBeg);
# endif
#endif
}